:root {
  --cbto-ink: var(--kld-ink, #17202b);
  --cbto-paper: var(--kld-paper, #f6f1e8);
  --cbto-line: var(--kld-line, #d5cbb8);
  --cbto-muted: var(--kld-muted, #6b6258);
  --cbto-accent: var(--kld-rust, #b85c38);
  --cbto-accent-dark: var(--kld-rust-dark, #8c3f24);
  --cbto-wash: var(--kld-wash, #efe8dc);
  --cbto-c: var(--kld-rust, #b85c38);
  --cbto-b: var(--kld-blue, #2f5d73);
  --cbto-t: #4a7c59;
  --cbto-o: #8a6d3b;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--cbto-paper);
  color: var(--cbto-ink);
  font-family: Inter, "Avenir Next", "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
}

a {
  color: var(--cbto-accent-dark);
}

a:hover {
  color: var(--cbto-accent);
}

h1, h2, h3 {
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.cbto-lede {
  max-width: 820px;
  margin: 0 auto;
  padding: 2.75rem 1.25rem 0;
}

.cbto-lede h1 {
  margin: 0 0 0.7rem;
  font-size: 2.15rem;
}

.cbto-lede p {
  margin: 0;
  color: var(--cbto-muted);
  font-size: 1.15rem;
}

.cbto-in-flow .cbto-lede {
  padding-top: 1.15rem;
  padding-bottom: 0;
}

.cbto-in-flow .cbto-lede h1 {
  margin: 0;
  font-size: 1.45rem;
}

.cbto-in-flow .cbto-lede p {
  display: none;
}

.cbto-in-flow .cbto-app {
  padding-top: 0.85rem;
}

.cbto-app {
  max-width: 820px;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 2rem;
}

.cbto-app h2 {
  margin: 0.1rem 0 0.4rem;
  font-size: 1.6rem;
}

.cbto-step {
  margin: 0 0 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  color: var(--cbto-muted);
}

.cbto-ask {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
}

.cbto-hint {
  margin: 0 0 1.25rem;
  color: var(--cbto-muted);
  font-size: 0.98rem;
}

.cbto-intro p {
  margin: 0 0 0.75rem;
}

.cbto-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.5rem 0 0;
}

.cbto-actions-share {
  margin: 0.85rem 0 0.4rem;
}

.cbto-btn {
  font: inherit;
  padding: 0.55rem 1.05rem;
  border: 1px solid var(--cbto-line);
  border-radius: 8px;
  background: #fff;
  color: var(--cbto-ink);
  cursor: pointer;
}

.cbto-btn:hover:not([disabled]) {
  border-color: var(--cbto-accent);
}

.cbto-btn-primary {
  background: var(--cbto-accent);
  border-color: var(--cbto-accent);
  color: #fff;
}

.cbto-btn-primary:hover:not([disabled]) {
  background: var(--cbto-accent-dark);
  border-color: var(--cbto-accent-dark);
}

.cbto-btn[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}

.cbto-btn-quiet {
  background: transparent;
  border-color: transparent;
  color: var(--cbto-muted);
}

.cbto-btn-quiet:hover:not([disabled]) {
  color: var(--cbto-ink);
  border-color: var(--cbto-line);
}

:focus-visible {
  outline: 2px solid var(--cbto-accent-dark);
  outline-offset: 2px;
}

/* One custom property per lens; every colored element reads it. */
.cbto-lens-c { --cbto-lens: var(--cbto-c); }
.cbto-lens-b { --cbto-lens: var(--cbto-b); }
.cbto-lens-t { --cbto-lens: var(--cbto-t); }
.cbto-lens-o { --cbto-lens: var(--cbto-o); }

.cbto-dot {
  flex: none;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--cbto-lens, var(--cbto-line));
}

.cbto-teach {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.cbto-teach-card {
  border: 1px solid var(--cbto-line);
  border-left: 4px solid var(--cbto-lens, var(--cbto-line));
  border-radius: 10px;
  background: #fff;
  padding: 0.9rem 1rem;
}

.cbto-teach-card h3 {
  margin: 0 0 0.2rem;
  font-size: 1.1rem;
}

.cbto-aka {
  color: var(--cbto-muted);
  font-weight: 400;
  font-size: 0.9rem;
}

.cbto-teach-card p {
  margin: 0.15rem 0 0.5rem;
}

.cbto-teach-card ul,
.cbto-example ul {
  margin: 0.25rem 0 0;
  padding-left: 1.1rem;
  color: var(--cbto-muted);
  font-size: 0.95rem;
}

.cbto-teach-card li,
.cbto-example li {
  margin: 0.15rem 0;
}

.cbto-rank {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: cbto-pos;
}

.cbto-how {
  margin: 0 0 0.85rem;
  font-size: 1rem;
  font-weight: 650;
}

.cbto-how-mobile {
  display: none;
}

.cbto-persist {
  margin: 1rem 0 0;
  color: var(--cbto-muted);
  font-size: 0.92rem;
}

.cbto-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  counter-increment: cbto-pos;
  border: 1px solid var(--cbto-line);
  border-left: 4px solid var(--cbto-lens, var(--cbto-line));
  border-radius: 10px;
  background: #fff;
  padding: 0.7rem 0.9rem;
  margin: 0 0 0.55rem;
  cursor: grab;
}

.cbto-grip {
  flex: none;
  width: 0.65rem;
  height: 1.15rem;
  background: radial-gradient(circle, var(--cbto-muted) 1.05px, transparent 1.15px) 0 0 / 0.32rem 0.38rem;
  opacity: 0.7;
}

.cbto-card::before {
  content: counter(cbto-pos);
  flex: none;
  width: 1.4rem;
  text-align: center;
  font-weight: 650;
  color: var(--cbto-muted);
}

.cbto-card-body {
  flex: 1;
  min-width: 0;
}

.cbto-card-def {
  display: block;
  color: var(--cbto-muted);
  font-size: 0.92rem;
}

.cbto-card-name {
  font-size: 1rem;
}

.cbto-card-piep {
  font-weight: 400;
  color: var(--cbto-muted);
}

.cbto-letter {
  font-size: 2rem;
}

.cbto-heroes {
  margin-top: 1rem;
  border: 1px dashed var(--cbto-line);
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
}

.cbto-heroes summary {
  cursor: pointer;
  color: var(--cbto-muted);
}

.cbto-heroes .cbto-hint {
  margin: 0.55rem 0 0.35rem;
}

.cbto-hero-field {
  display: block;
  margin-top: 0.5rem;
}

.cbto-hero-label {
  display: block;
  font-size: 0.82rem;
  color: var(--cbto-muted);
  margin-bottom: 0.15rem;
}

.cbto-hero-input {
  width: 100%;
  max-width: 260px;
  font: inherit;
  font-size: 0.88rem;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--cbto-line);
  border-radius: 6px;
  background: var(--cbto-wash);
  color: var(--cbto-ink);
}

.cbto-hero-input:focus {
  outline: none;
  border-color: var(--cbto-accent);
}

.cbto-hero-input::placeholder {
  color: var(--cbto-muted);
  opacity: 0.7;
}

.cbto-moves {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.cbto-move {
  font: inherit;
  font-size: 0.7rem;
  line-height: 1;
  padding: 0.3rem 0.45rem;
  border: 1px solid var(--cbto-line);
  border-radius: 6px;
  background: #fff;
  color: var(--cbto-muted);
  cursor: pointer;
}

.cbto-move:hover:not([disabled]) {
  color: var(--cbto-ink);
  border-color: var(--cbto-accent);
}

.cbto-move[disabled] {
  opacity: 0.35;
  cursor: default;
}

.cbto-dragging {
  opacity: 0.5;
}

.cbto-examples {
  margin-top: 1rem;
  border: 1px dashed var(--cbto-line);
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
}

.cbto-examples summary {
  cursor: pointer;
  color: var(--cbto-muted);
}

.cbto-example {
  margin: 0.6rem 0 0;
}

.cbto-joy-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid var(--cbto-line);
  border-left: 4px solid var(--cbto-lens, var(--cbto-line));
  border-radius: 10px;
  background: #fff;
  padding: 0.6rem 0.9rem;
  margin: 0 0 0.55rem;
}

.cbto-joy-name {
  flex: 1;
  font-weight: 600;
}

.cbto-joy-name-main {
  font-size: 1rem;
}

.cbto-joy-piep {
  font-weight: 400;
  color: var(--cbto-muted);
}

.cbto-joy-buttons {
  display: flex;
  gap: 0.35rem;
}

.cbto-joy-btn {
  font: inherit;
  font-size: 0.92rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--cbto-line);
  border-radius: 999px;
  background: #fff;
  color: var(--cbto-ink);
  cursor: pointer;
}

.cbto-joy-btn:hover {
  border-color: var(--cbto-accent);
}

.cbto-joy-btn[aria-pressed="true"] {
  background: var(--cbto-accent);
  border-color: var(--cbto-accent);
  color: #fff;
}

.cbto-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
  margin: 1rem 0 1.25rem;
}

@media (max-width: 640px) {
  .cbto-cols {
    grid-template-columns: 1fr;
  }
}

@media (pointer: coarse), (max-width: 640px) {
  .cbto-how-desktop {
    display: none;
  }

  .cbto-how-mobile {
    display: block;
  }

  .cbto-move {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
  }
}

.cbto-lead p {
  margin: 0 0 0.7rem;
  font-size: 1.12rem;
  max-width: 62ch;
}

.cbto-stacks-head {
  margin: 1.4rem 0 0.35rem;
  font-size: 1.15rem;
}

.cbto-cols-lead {
  margin: 0 0 0.75rem;
  color: var(--cbto-muted);
  font-size: 0.95rem;
}

.cbto-col {
  border: 1px solid var(--cbto-line);
  border-radius: 10px;
  background: #fff;
  padding: 0.75rem 0.9rem;
}

.cbto-col-compare {
  background: var(--cbto-wash);
}

.cbto-col-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin: 0 0 0.15rem;
}

.cbto-col h3 {
  margin: 0;
  font-size: 1rem;
}

.cbto-col-ask {
  margin: 0 0 0.5rem;
  color: var(--cbto-muted);
  font-size: 0.88rem;
  font-weight: 400;
}

.cbto-edit {
  font: inherit;
  font-size: 0.82rem;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--cbto-line);
  border-radius: 6px;
  background: #fff;
  color: var(--cbto-ink);
  cursor: pointer;
}

.cbto-edit:hover {
  border-color: var(--cbto-accent);
}

.cbto-mark {
  display: inline-block;
  margin-left: 0.3rem;
  font-size: 0.75rem;
  font-weight: 650;
  color: var(--cbto-accent-dark);
}

.cbto-col ol {
  margin: 0;
  padding-left: 1.4rem;
}

.cbto-col li {
  margin: 0.3rem 0;
}

.cbto-col .cbto-dot {
  display: inline-block;
  width: 0.6rem;
  height: 0.6rem;
  margin-right: 0.4rem;
}

.cbto-joyline {
  margin: 0 0 1rem;
  color: var(--cbto-muted);
  font-size: 0.95rem;
}

.cbto-reading p {
  margin: 0 0 0.8rem;
  max-width: 62ch;
}

.cbto-compare {
  margin: 1.25rem 0 0;
  color: var(--cbto-muted);
}

.cbto-history {
  margin-top: 0.75rem;
  border: 1px dashed var(--cbto-line);
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
}

.cbto-history summary {
  cursor: pointer;
  color: var(--cbto-muted);
}

.cbto-history ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.cbto-history li {
  margin: 0.2rem 0;
}

.cbto-footer {
  max-width: 820px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 2.5rem;
  border-top: 1px solid var(--cbto-line);
  color: var(--cbto-muted);
  font-size: 0.92rem;
}

.cbto-footer p {
  margin: 0.3rem 0;
}